firmware/target/mips/ingenic_jz47xx/pcm-jz4740.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2008 by Maurus Cuelenaere
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include "system.h"
  23 #include "kernel.h"
  24 #include "logf.h"
  25 #include "audio.h"
  26 #include "sound.h"
  27 #include "pcm.h"
  28 #include "jz4740.h"
  29
  30
  31 /****************************************************************************
  32  ** Playback DMA transfer
  33  **/
  34
  35 void pcm_postinit(void)
  36 {
  37     audiohw_postinit();
  38
  39     /* playback sample: 16 bits burst: 16 bytes */
  40     __i2s_set_iss_sample_size(16);
  41     __i2s_set_oss_sample_size(16);
  42     __i2s_set_transmit_trigger(10);
  43     __i2s_set_receive_trigger(1);
  44
  45     /* Flush FIFO */
  46     __aic_flush_fifo();
  47 }
  48
  49 void pcm_play_dma_init(void)
  50 {
  51     /* TODO */
  52
  53     system_enable_irq(DMA_IRQ(DMA_AIC_TX_CHANNEL));
  54
  55     /* Initialize default register values. */
  56     audiohw_init();
  57 }
  58
  59 void pcm_dma_apply_settings(void)
  60 {
  61     /* TODO */
  62     audiohw_set_frequency(pcm_sampr);
  63 }
  64
  65 static void* playback_address;
  66 static inline void set_dma(const void *addr, size_t size)
  67 {
  68     logf("%x %x %d %d %x", (unsigned int)addr, size, (REG_AIC_SR>>24) & 0x20, (REG_AIC_SR>>8) & 0x20, REG_AIC_SR & 0xF);
  69
  70     __dcache_writeback_all();
  71     REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) = DMAC_DCCSR_NDES;
  72     REG_DMAC_DSAR(DMA_AIC_TX_CHANNEL)  = PHYSADDR((unsigned long)addr);
  73     REG_DMAC_DTAR(DMA_AIC_TX_CHANNEL)  = PHYSADDR((unsigned long)AIC_DR);
  74     REG_DMAC_DTCR(DMA_AIC_TX_CHANNEL)  = size / 16;
  75     REG_DMAC_DRSR(DMA_AIC_TX_CHANNEL)  = DMAC_DRSR_RS_AICOUT;
  76     REG_DMAC_DCMD(DMA_AIC_TX_CHANNEL)  = (DMAC_DCMD_SAI | DMAC_DCMD_SWDH_32 | DMAC_DCMD_DS_16BYTE | DMAC_DCMD_DWDH_16 | DMAC_DCMD_TIE |
  77                                           DMAC_DCMD_RDIL_IGN);
  78
  79     playback_address = (void*)addr;
  80 }
  81
  82 static inline void play_dma_callback(void)
  83 {
  84     unsigned char *start;
  85     size_t size = 0;
  86     pcm_callback_for_more(&start, &size);
  87
  88     if(LIKELY(size > 0))
  89     {
  90         set_dma(start, size);
  91         REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) |= DMAC_DCCSR_EN;
  92     }
  93     else
  94     {
  95         /* Error, callback missing or no more DMA to do */
  96         pcm_play_dma_stop();
  97         pcm_play_dma_stopped_callback();
  98     }
  99 }
 100
 101 void DMA_CALLBACK(DMA_AIC_TX_CHANNEL)(void) __attribute__ ((section(".icode")));
 102 void DMA_CALLBACK(DMA_AIC_TX_CHANNEL)(void)
 103 {
 104     if (REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) & DMAC_DCCSR_AR)
 105     {
 106         logf("PCM DMA address error");
 107         REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) &= ~DMAC_DCCSR_AR;
 108     }
 109
 110     if (REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) & DMAC_DCCSR_HLT)
 111     {
 112         logf("PCM DMA halt");
 113         REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) &= ~DMAC_DCCSR_HLT;
 114     }
 115
 116     if (REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) & DMAC_DCCSR_TT)
 117     {
 118         REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) &= ~DMAC_DCCSR_TT;
 119         play_dma_callback();
 120     }
 121 }
 122
 123 void pcm_play_dma_start(const void *addr, size_t size)
 124 {
 125     dma_enable();
 126
 127     set_dma(addr, size);
 128
 129     __aic_enable_transmit_dma();
 130     __aic_enable_replay();
 131
 132     REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) |= DMAC_DCCSR_EN;
 133 }
 134
 135 void pcm_play_dma_stop(void)
 136 {
 137     int flags = disable_irq_save();
 138
 139     REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) = (REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) | DMAC_DCCSR_HLT) & ~DMAC_DCCSR_EN;
 140
 141     dma_disable();
 142
 143     __aic_disable_transmit_dma();
 144     __aic_disable_replay();
 145
 146     restore_irq(flags);
 147 }
 148
 149 static unsigned int play_lock = 0;
 150 void pcm_play_lock(void)
 151 {
 152     int flags = disable_irq_save();
 153
 154     if (++play_lock == 1)
 155         __dmac_channel_disable_irq(DMA_AIC_TX_CHANNEL);
 156
 157     restore_irq(flags);
 158 }
 159
 160 void pcm_play_unlock(void)
 161 {
 162     int flags = disable_irq_save();
 163
 164     if (--play_lock == 0)
 165         __dmac_channel_enable_irq(DMA_AIC_TX_CHANNEL);
 166
 167     restore_irq(flags);
 168 }
 169
 170 void pcm_play_dma_pause(bool pause)
 171 {
 172     int flags = disable_irq_save();
 173
 174     if(pause)
 175         REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) &= ~DMAC_DCCSR_EN;
 176     else
 177         REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) |= DMAC_DCCSR_EN;
 178
 179     restore_irq(flags);
 180 }
 181
 182 size_t pcm_get_bytes_waiting(void)
 183 {
 184     return REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) & DMAC_DCCSR_EN ?
 185             (REG_DMAC_DTCR(DMA_AIC_TX_CHANNEL) * 16) & ~3 : 0;
 186 }
 187
 188 const void * pcm_play_dma_get_peak_buffer(int *count)
 189 {
 190     int flags = disable_irq_save();
 191
 192     const void* addr;
 193     if(REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) & DMAC_DCCSR_EN)
 194     {
 195         *count = REG_DMAC_DTCR(DMA_AIC_TX_CHANNEL)*16 >> 2;
 196         addr = (const void*)(playback_address + ((REG_DMAC_DTCR(DMA_AIC_TX_CHANNEL)*16 + 2) & ~3));
 197     }
 198     else
 199     {
 200         *count = 0;
 201         addr = NULL;
 202     }
 203
 204     restore_irq(flags);
 205
 206     return addr;
 207 }
 208
 209 void audiohw_close(void)
 210 {
 211 }
 212
 213 #ifdef HAVE_RECORDING
 214 /* TODO */
 215 void pcm_rec_dma_init(void)
 216 {
 217 }
 218
 219 void pcm_rec_dma_close(void)
 220 {
 221 }
 222
 223 void pcm_rec_dma_start(void *addr, size_t size)
 224 {
 225     (void) addr;
 226     (void) size;
 227 }
 228
 229 void pcm_rec_dma_stop(void)
 230 {
 231 }
 232
 233 void pcm_rec_lock(void)
 234 {
 235 }
 236
 237 void pcm_rec_unlock(void)
 238 {
 239 }
 240
 241 const void * pcm_rec_dma_get_peak_buffer(int *count)
 242 {
 243     *count = 0;
 244     return NULL;
 245 }
 246
 247 void pcm_record_more(void *start, size_t size)
 248 {
 249     (void) start;
 250     (void) size;
 251 }
 252 #endif